Two flow solvers for liquid-liquid impacts

The performance of two flow solvers is compared on liquid-liquid impacts. The two solvers are of completely different nature: one solver is a Mixed Finite Element scheme, based on the potential flow theory; the second solver is a fully Lagrangian scheme, based on a Smoothed Particle Hydrodynamics formulation. For the tested flow impacts, they compare well and adequately model free surface deformations after the impact. The analysis reveals what are the effects of computation conditions and clarifies the range of validity provided by the numerical models. In the case of a 2-D liquid column released onto a liquid pool at rest, it turned out a remarkable similarity between the two solutions. Air entrainment and rebound of the free surface along with the Lagrangian mixing may be vividly simulated.